Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '380c9cda4946b4e0ea674bc023f6c26d624c7528392062228a14494a73196c42' 
  AND token = '4J8CvqAGPnKtIHuPWa/T255X0ghhaBg914xleojhUH8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00049

JSON explain

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