Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '80d3e92a9a914b15b219566f7eda966e4b67f7eb72fe8456f9e1d099700c4ba1' 
  AND token = 'TaApG/f5jLo47bQMHIPLu6DfbkY0LGHLs88Hn3IjQPU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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