SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd0eb5db73bd3aabc8935d156a285cc1a4a60cadc6eb7119fba743d7e19cdffbf' 
  AND token = 'bVevunGZlEkmFQU/T+YcJMw4oeG+++2CQVehOH/Yvpw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00070

JSON explain

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