Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a203449141a6b0fe19fd00c0b231bc8dea2edecc5bf57137ea4a36830c35f0f4' 
  AND token = '075PJ9l6KbmBIjx1cwqALpzcekxF8ML6uW3uc31g+E0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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