Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '423323647ad1cf4b2b88f8032335a521b6a97733f44ac8c3516d95668879733c' 
  AND token = 'vNSMDz5uCoRKl6lweYtcMwfSToWm4J5HnM2oDTNBMFY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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