Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2ff9d6960896d941eb460c4a322f1b67251dad4e6dd0f008dc8be15cb4040b8e' 
  AND token = 'wqEdZAVKTeesisYu2s0CYmdIg7ONV/Vr6eK/++/QWcM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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