Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '95ff7a682467ddab04973e9fbd5b2073a6f19e256a13c5f3bfef7c6024d38421' 
  AND token = 'FngL4ZM4Xiuv3otMfzq9efJE24eVOtlkYaiuq0jMce0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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