Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '579f3dae2ee244c871127aaf627607ab11e3ddd3713829f09cc8880bb098187f' 
  AND token = '2RKIYjuGTd5mmF0yKxaQwxurkysJwM89n7wmPl91gI8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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