Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b93acb6ad0e93a69e0edd7151f33742399bd581df364d41ade294a08001cd0f3' 
  AND token = 'oDg0hetVyh0T8/2Ff8KRXBDoUyx4kAr5Q3fFzTJI5qY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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