Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0001baa55eeeb00cf733d09a714c3f305f2dc81dfab687e26c65c3da62fcb044' 
  AND token = 'kBBL4jG4A2zC6SzED2iQtRVIXEDr+/rTIS7OsUONrv0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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