SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e5713ae62c05ec8218f9302766828ba8a9e07b77adc74ee181ee725ac7a87843' 
  AND token = 'jIqpFVjkpB1P5ZGA2gmFJAgSPSKq/IyxIwsBFIzzMsY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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