Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2d677bff8f9d104e6e0643c35dc5e7a5876addcd2f9575e931105de6b996cce2' 
  AND token = 'rP6j9p/+c535om+844FZByxk/j45DJtec38TIOrTt0w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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