Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ce60f88331030fa54d105da7569ba33b0d83b15011a87062153fc406af80c754' 
  AND token = '4O0gU69RKghSceAY5IZTtmDIw7XEdgmov0uAlyFtQ4g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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