Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '08319d9c98b64f31fac7359007614cef447b52e8f6685eccd7054dbfb444604c' 
  AND token = 'sMxr5f++25e5x81r9HneBOlcVKILQhgw8nm+hqdS5Hc=' 
  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"
    }
  }
}