Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '9f9d9d338976d5395ab1edb300c50b584d99f42a1cb7254ab5d1e9a2ff0b62b1' 
  AND token = '2GZ+MIZZW/zGOn3dE7lQSfRF160c3m9oXAJlOUdloWE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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