Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5f121137438543d210a865c1d0b108570314946b9b1e7f168b667cd1a3893817' 
  AND token = 'Ffk2v7TS3AIQ23yX3GdkztZiu0I1hEXoQDS/oi+rliU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00012

JSON explain

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