Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cb167a72be4435c86e8b70d7ed2e3cf59549b126aa45aa3217875c4fb9f716dd' 
  AND token = 'RdZLt0IuO+cPSDySWVRJDdZ2VrIUFsLVBp08Mke6lMM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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