Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cda8325bdc8b1e9ac84387c5bece1bdbaf50ce24fda7b8f4afcc7bbd85c9a706' 
  AND token = 'rMq7xYNo1qpbieha4KYhgYp2c3m7kWOA13aGEjyqI10=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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