Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '83d59d92d9655a6e49e4b5727cabfef1e887edb75ca2dcb4b28a2271efc51b4e' 
  AND token = 'a3gefeXCRx+0mJCPvJrRUIkZNbtib3G/wE2P5EALLN4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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