Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c3b025e559037803646cd9aac63b5ae61a31084040e1702b71a068dc88d12aba' 
  AND token = 'xpBkKjTD/oarM3ySxOUv6JKek8qrAcr1Z5K6+ZKcueY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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