Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c1d5714d36ddc0106f056d830cc36f05f160c2341daf90694d1b0e46c9defdc5' 
  AND token = 'WrNR2SJ+7eyhvJ8oFiPmuMgF2Pq7ovT0UfyIOZK77Zg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00049

JSON explain

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