Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cd9c33a5be65546dedd2999bb2addf2321fff0429a133d0cdfb2876f1484fd05' 
  AND token = 'e1tmwQ+vhTSPXVdu4loeuJnRLO2pwAComd4vviyoraU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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