Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '464b8c8ef155f12793847b16c83f2017c5866176ff6d2d70840e60269f8a707c' 
  AND token = '66eKqdn+I4/BQsxuwDT1EBYIurzso/3maIWrokBuMVc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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