Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ae28ffcf3bc398300d6f7b458dff539792db42b915da7d07620f0911d05fb369' 
  AND token = '4d3/SskZTB5E/z1pHm2t8KlLP+Emlf66S8PBsQ2IrD0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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