Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '39676495f14df112058ff23d656c8e0cde8109d8aa85cf0f5e021fa087507a3d' 
  AND token = 'J2m2pXGczMEmLtjvjYKWaxdxd0UnXHY0dlgkhg/EAaE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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