Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'de34ddf2a7ce86fe666a2e15c1668ef5a9e2ebe1bb25500583161d63cbf704f9' 
  AND token = 'aBHAFBR38QaKoqOPvqval32ifu4jc3ea9MluQ1P8MBc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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