SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '191a47985c6040ccd6ab605ce15043f550721f03cecbbcb2582ee682f76f4825' 
  AND token = '1u+oRguIbJ5ZKDut+StCbBY5Xkj4FpUwwhOyN8cWpPM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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