Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3f7036a3224a93217488e6d788430b913ba6df2351e16437bc8063c0ad3fd0d9' 
  AND token = 'qXlCAm5jXolAdszztHHJ2QpeSTfJDrM1F949aIgmCqA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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