SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9385c1049d387fa8f0a8f5c9e38217863f48ca465cf035dcdc16435971b59672' 
  AND token = 'ZGm1GgT7TG2Y0JdECtcCtvz8qdSRzYBxq7rt9GCK6WY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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