Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd6df62d2f10659475ee9f818e08eb15ed4151dd6d81795d4c6144415914722b6' 
  AND token = '1IrAxu7O5BHiGbe3Gj7MrD02pCPU4yv31yW9yfYq3J0=' 
  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"
    }
  }
}