SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '77604ebe999453dede0f37f47dd9b251a28c1a4bce16b18f5450dece266d92ef' 
  AND token = 'VrBwL8qu0lWOd2T3pWoLhXHdQZRqDJyYowbjvvTm6CM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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