Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '048ae018d235df27d295ad8ad84eef31144b18746a6a83bfb326ece5fe0feadd' 
  AND token = 'YCi33j1Kr9u8Ax4OGiR3dOylL4i0isDhxp2FdT0D06s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00014

JSON explain

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