Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cd0decff23de85d0eba3eca1172071d61b344d38a9c46bee43575c454da13bba' 
  AND token = 'KB5re/tHrdo636hAYl5Vo3PBmD4ckvUIRaSMKF/e4Bg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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