Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd75e7074a8658a18d3ee4b5b8efcabb523a99175afb6affce8d8a3e0b9d60b71' 
  AND token = '2VtNgI+oQsrgi8oPCQuaIobeXLHx4WBx8OaHyjs/yLc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00056

JSON explain

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