Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4b8836b29e744f8c549ed87eb588283a7da689282e666192cdea3fdeed630ff9' 
  AND token = 'ru2HrMqyCiatApnnSvl6yoduAZWjEMpZRfyLrtMtaPw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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