Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9dac4dde8e57ffdfc8b33bd903ef82d7281beb88d1739128a2fb9a63ebcd874f' 
  AND token = 'pUMxDD5QjBYT8XBr44J45e12tvr3jbZRXjVw+bXWfTM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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