Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '62bb87fefcfbffa057c5732814d87614156fb651574cbe6d3ac7fd012c9f3825' 
  AND token = '4n5F/dsW1rv4Blu6kfGqtrQ8DhdyTtk1OC1Qyh5joIk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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