Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9cec08b57012b6fdcaaec32c5233838aef4079902d10a21d39aee51667b2f532' 
  AND token = 'K1OgORoJM93EwUEspw45+WvNvHCr6CE1Gnc1FUX7WA0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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