Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '674e7235963e8300b8aafbdb8b16f32c99771ce188d5ce43d22209480f4ed293' 
  AND token = 'yr8WYTcKkPK6A+b22/izMTIYTi9Yyvp5NtDLpyXkh/w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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