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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f2b53b72277a85c26db1725c4be881146080fe6522d98eb64b4eadd57e0bfd50' 
  AND token = 'VQrb1Y82f6l+EJhCw7OSYsj0nRX/jjBy/z4QRO06X08=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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