Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2553fca32aef20c70517f4ce9c6011de47664db8aa643094a0aa5a938e7ef3b6' 
  AND token = 'o/7YMjrZNl+hATJUkicDvUfhHkfr5x3kgDZrlISZAWI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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