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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'be1da05494d18aa7e0dc1478e517227927537731c9aae702d4d8944ac902a099' 
  AND token = 'Lb07JRrjfWZ4FGtfehKAIJrKlamYTa67p1VDUx7V5fU=' 
  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"
    }
  }
}