Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a4e618bf18c90a5d88c761a456f2b144f2840446f7451d448e73a3d00d824e9a' 
  AND token = 'RRmin0nZtmI0wh0rY1gCO//uinhiN6mKcwGpVGYiC1E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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