Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8b37b5a50f0c259baa8872cf2c4914335671322234c86012f80e600d3e01179e' 
  AND token = 'szogyKIZKQD6uaf2WpoQ7q2wHZqehm0P4QKVCBlK4aM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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