Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '914dd6b87035353c87424b0072fdedf6bb1d2fa1a4354020e44586bbf2efd6f7' 
  AND token = 'BuOkHVJm7IUl52cR2RgEa9AWyhW1D/EysY6/aTijRPo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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