Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'aac637796eeb6040c33e14233fe261cb134f8e9aabe0aaa7f0695dd21b51b8c6' 
  AND token = 'VssA7Evs7lGsPGXswq0Q4va6AyBWQ2qAHhwt5t9Fu2s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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