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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ef2b8ce21c1bd87e7f3578331f6375e468c0ed55233c2a33c57ffedf5c077369' 
  AND token = 'RZziVuQJHq6vk5DIaJScFsGvZeUQHhZHp1dq0iLxpJU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00060

JSON explain

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