Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '54c0d696eb6353b1961e90e051d40f2dbea0eb9136a67fe8b5afe9e44142d3f8' 
  AND token = 'qccKrmtrjma2YVsKnQBdfhMBv4wdOGImQJ+Kve+vx+0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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