Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b7471dae8dea8c56e8533d9b65298c937ade8a20b7af28fae3e7e8cc798eb82f' 
  AND token = '1FNX63aBwbQfw2Jx5kI1txxyuAC9bk6n5UBuoOZi1L8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}