Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ac50ae5582df65337597262a8d3c26b5c090bbd89db0670ac0937614b9075693' 
  AND token = 'AfDtANbtGb6iTBqhvQ8gBr7diDvvHfQIUtpNWfrcKQ4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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