Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e26e3724768bbcdd094262a93c9dcbd550c0d495c59dcfe0c3333fc083c11024' 
  AND token = 'VFDkAUyqnBC+G1gAxrEVzDV0nP6OiEIoAiuCYHFVSGs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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