Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bbcd06acd5607ea697c6809264bdc7a88e1201c6f097ff30d9d26f47ce48ad89' 
  AND token = 'LX8n7Bq6KurMt1GsPPo0El+e5ypiDJNzG8f2BxXAOCE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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