Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '54f053321f4a91ced28b2d41a1b97c4a46e1a16b1fa7196864ca80d989550082' 
  AND token = 'u3TqGQX+lE2Xff2YDJizWdJW9e142Ijq/zccz7gkuT8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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