Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dc3eabba62d4a8d7f800a5424130ad830773c0074fd42b2c4c734c0b907aab76' 
  AND token = 'kFrs38/Q/lH0plgasrvQ+W791TDM6C58I+DbNYuJVt4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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