Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '3fac32d815c78877492c203b42ed564be1615d100741783d0072aba0da10b5b9' 
  AND token = 'xpH8kosLuE/EZVbDrPKa9RAApiqhXha1AfwDK9NHSvU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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