Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'f33b4ea000f4c89a61477c54c2b5a6f0983c1e865ae8145f3c313356d722e3e6' 
  AND token = '/nZi47kZ+Hn15xeX3R5i/YHHAdLqdTjyEJGnp2oC/Uw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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