Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '819b1482435b3f789867706cbd9b9648f436ad7cffa4ce2ae42fc2a64e829cdb' 
  AND token = 'XdHYwY4PSX+Uuh5bT+ZEJdevNweTso++ISlE8fU/E4s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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