Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3df7add11f7be02edb4658c80d4e248552af48e3d542bb78da70a040933e444c' 
  AND token = 'zm619z2/4VB1068HVjUT8tyaeWW3AULpVSeGBAwJzAU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00013

JSON explain

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