Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '37dba2fa74e4e258b2200f94536de34748f5c06c978e0cf2726eb8c341367314' 
  AND token = 'nVMlEKvkoaUG9Btc33V69zLZdFn8dUru9eYRH5HkZMI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00051

JSON explain

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