Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd8040ed0a47f0707038c300f56a01450d6d6beb5aca2bdfdc7e54c11bf886a42' 
  AND token = 'ktSpVprnsCRKVsl58WEkU3CRBipJ7nd8qSbswS07nFo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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