SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '0f2570b919ef199c78839c0b19305632a70c83434f1a722271d0d188bb6d1af2' 
  AND token = 'jEul8MVZu50I/y7+3TLiP8MjXDZPxzBOP3sMo1uiBNY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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