Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '5cb7faf774e42acb0aa750e42165f3fc22500c521350fd5c445ec95f22763b5c' 
  AND token = '7ORDpRw+tJJ7g16M24XtljRJyfB44M13Gr2xPIbi3Js=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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