Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8835205fa6be2411680237902021837d7c80d337062d363a2f46e07c4ffe0c59' 
  AND token = 'JRCcpjNCcJcdkn8UwZ+aaag/4XQ9GBy4R/DIlltn2i0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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