Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6bb8b74c0346f13225b2abc474e187494ec3b80eb6098d0d7bbf1e264e22a0d2' 
  AND token = 'CfPAOhXsToQICjTRzeUDcw6LByvHqc7wERgg5fccVgk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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