Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '1cb49563f643a116a158211066135fe48b854524b5b5afefb247abcab2add57d' 
  AND token = 'boBgBfNvFMajRTnGBy301+N75+nEORiAKlm+fR166Rc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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