Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1dfd672e3617531ec010d851ed44a28a886fd56dbcf9c2aea356031a34def2af' 
  AND token = '9pU2sMAjI3kEBDgCryqcs0/9pIO0nBIMdGMlk9CI0ew=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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