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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e04cb967f58fb9af23dec198c6e8fa969d60817c80f6f5f4131fc4447dcd8dc7' 
  AND token = 'jWqzkozk0SAUKJr83HmPX5j9TqKfuC6etXBA0BufaZc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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