Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2c68c6085f967d2c16841ad1aa7de7f349072bf14d260d1bce5baeeb9ea25a57' 
  AND token = 'Gihc4W1IJXFb3Mp4wu4SnWfAgCQ8O/HlirUMJXiqQGo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}