Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c2e99d30ad66efb260b6103d6af21694a8dc0fb632ccc35c8df8f9ef1c4b8209' 
  AND token = '6BLJhE0neNrOVGb3EXpgFe+rMOoAW2BYOoc5agJRjmQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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