Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4dfc52eae8cf37a61c0fce2d66ae3e9c76117a18a03a60917b3e9d8751dd4597' 
  AND token = 'vSywCboz420OK46svo4vc5QFWZNDjtcz7X0DLlNPOWg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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