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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7faa00113b1024077073a64a0ddbf16876d4fdc66715180fe26cb093523fa8d4' 
  AND token = 'DNNwAsmPvWNIcxCBKa09L5jlMkjXSQsGCLj5b/g1lcU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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