Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '74ce861acedb59b3188c7a61a436dbeab4f6e7a23dbb12118be67a9aa2819f14' 
  AND token = 'why+FLFrrA57lX/HajPGoeZx6F+1HatjcV1WOtTaVWY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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