Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd13a0d27d03095647bce6d5b2d03df6e94734bcd198eb61d279dcac2d8287593' 
  AND token = 'a/lrwLfCJabiKm1xjb3VFo+qjufkdB0XjGHdYlP1NjM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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