Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '70b5aad74fa29bc23b5cfd4dcf9622ce82590aba6972218d7ee149d02c8ab28a' 
  AND token = 'ZEfA8KSTfxXMqSaiatPA8G5TRoL5D8SWg28EkIUuMWc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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