Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '816f8020997e2034a5d630d18d8c5c6b050fcb54c45c2e9ca0b2b85d732d55f9' 
  AND token = 'jGNmszNdQaznCrfnJUnK21Rwk4FAxtp9WUMQW7306Bs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

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