Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3f8e53c2dd6715ec0776dc49f09b3bc2309aec4280eb43a2bf399fb62345eaac' 
  AND token = 'ql35/Xvx5nn77y52VIhp13Yjy+EbB03irbeFvm8KT/A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00013

JSON explain

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