Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '67a426fc96e6198c640c397600552182e985d14199b46ed7cd6688053b9a52d3' 
  AND token = 'Z8qjW1TxFA9FE4F26WzSADozhstpMOCThmXd3ZmsnNQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00056

JSON explain

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