Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2afd0aab5de3d3c5653d88bd6340da54f5b245e5cea68ceecae180988d9dc2d0' 
  AND token = 'mktXmN8kiGRmGXFPIBBpPNhwlEFtICVMQ2yWyIbm+bo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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