Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2da288fe54c84f236d2716ee463778441ab76cb1b1a812339175b1837c46ddc3' 
  AND token = 'ocBKZS7e3sfxrIqyPyqTtUKAVeMmvQP3tWQtGfAo7NM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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