Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'f992c44d10b010bc181d4618d1c0d2c1ad2f9d60e3ea40d7701e95e0e1fde1c4' 
  AND token = '3Iw8NAhi7g2y7SL9tYdfuF9LpAruBrHaQXDmEaWV38Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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