Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '74a9deb2159c92b15452a73b894468a13b58a48e2b88a6ff5a6df4d3ea5e033a' 
  AND token = 'g0N/mo2roxNZdVp/BAaLfFf1Bivs3UOF1tg9PtCJZPA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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