Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7863bdaba017233ee1f7c46cfa47d371389776c8afd4076bd2dd9ad0196b4e78' 
  AND token = 'hqdbkf4BcqibNk24VqyQpDW30iRPimsMUwGYpFMQz2M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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