Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f8ac470132db3dd91ea61992270926aa55597d988a83b8bb1d8503e30fe0a25a' 
  AND token = '4NYzxjlziJUkw4yP0tLay6LgpSDObKK0VVuC3JoKfac=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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