Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2c48371c1487097022ac7dd3b23d98447f1eabd11199d860d4d4da4cd0ce90e2' 
  AND token = 'mRgPK6U3DoVPDO1u+YJ+7ljpy4jTxbOwD56EN5UJDVs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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