Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '14dfa39c3fcf3712420e5add56c48aa2494cbe56e1a577dcf7fbc3857a81aea7' 
  AND token = 'uZt5Phlx3+X0VMHsZIfeL0iF/RhRVcl/XuPWJn2N/NM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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