Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c89efb2b5c35e3b75c4e825218b32d5e3b05c53ce28f4bee5f7e5688c587adfc' 
  AND token = 'edWt2sUCXNO6Ew6aR/YweUuhQN2WCReG+wLP84GeS3c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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