Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5caee838cd9dde144f7aa8dcb2f78720e8a567aa7282a0267eb1ef684a4922d3' 
  AND token = 'F2lZ30ylK7yn3vxlBrIEZTsHO3hrOQtgCwf2Jk8t+G8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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