Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0331f0003fb90b36f2d6ef441707c8ff9066987574d50808bcce599130ae6e72' 
  AND token = 'KGRSjIHwV4uMvB7mArCvVMa2Xd48nRUjOHrQa4za+D0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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