Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c93e89fe32380daf5d5ad6c4f43f7ed841c5791233c7341d20837633974090c2' 
  AND token = 'Vl2U4wEE/HaRcFwiNHvhTGB9O6oD/xZ11OcVn3IhVEU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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