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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e8afd7cac4bc7a5bad1924a02b6cc8f344c0350f67b9c3c049ac9fb924f3ad41' 
  AND token = 'jsd7F7VA227Yx79jk4jG8qgLoRkmlxIeUYc/fdsHQnU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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