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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7384fd148b2a179f2792ab98792fe1eec6da4bc9de8ce18b25aaf5d74b611a9c' 
  AND token = '+TlqXShfol2nKWAq3v0KEAZx27ZdGnep/bsMb69J4cw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00014

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}