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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8fa57d7e6a5ca739506b558693aa9c0d7d5b538ed2670ca00b25c905baf911c4' 
  AND token = 'jV6i0tBycX2EpA4tzuVuZeGZMvW4R6fIm255QQHm6tg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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