Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'eee891dbc73ed6048aacd3876122113c0b10910e9e2b43b8b338e373fa8148ea' 
  AND token = 'zqgULHpEjJ8ZqVDvNvfXEi2MasdWCcZGOLqLABtbtsE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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