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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'af67c37da5402a40733f2596aefc3b281738cc899d02b9ee3ce8741b20e08fc7' 
  AND token = 'EvJy09/Tsm7vM6p9Dkz9hJMk6bOaDk1PbvXEiYbNp0c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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