Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fdfc76663d6f216af32a4f0678d4e9af7a6b12a2cecd08bcea10f64224d1ed72' 
  AND token = '6fpK7wBVXxfzS/K09W7tNe/jCimFcqLq36bB4THlSzM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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