Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f4fc7b6e5669451c1a46b1e57ae2ad402e3fe3583e773136a514f1862e93754c' 
  AND token = 'Qd3VAymBOTyKLZIVmgsEfE6XDGRl3HIK5p336bDsiGA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}