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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f5f62c4ee082b162e566ae1d2de9f8dcdff69d06f12253ae73103253783c0a23' 
  AND token = 'kbM2jLZDp9hgwjn9lC4BuEMW4EW3ZS/fLJv2GjG8wzE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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