Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fae739d403911639c226a7707cd5f4bba6d26ff1b8f406ca66b2f0461d25b6f5' 
  AND token = 'rVerTF6SCWZ9ZHmxTlgT337iHoHNkuxYQYgfuPZgORg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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