Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '104ddc922abf7edefaf396928dff4efb5698bc33a674d56fe619a5895de193ab' 
  AND token = '39M8GrqD6bFNLFp4E/DbMaHo/yGHKR9YmV6oFQW5Uac=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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