Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c2ae6d7a46b6b3d1cacc97436ac239139c2b6c5c37241a383d3fd26edc3d433d' 
  AND token = '6XvgMTUdQKSKglM3WcPvrg/R1mLvV+ee7I+KzglI3ho=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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