Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ec0320fda278ce21d60ccb3efff7f61230128d3c23d8c58596f3acad7a2ad670' 
  AND token = 'i+te/TgtuiIbkapQpWupZC2fjfRSKCYK7+8VTXUBLYo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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