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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd5d4c059351102318158b62769f68e1f8ad2e0a6c5b45d3224163b7bd814a073' 
  AND token = 'babmCYOogFEKwjoj8GiKUmCxH5Y9ptfcLGGIrMQ2NIA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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