Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5f0706c5a1011220203a0f73083d9070b9dfecce2fde98b04ca7d7199e17fa0a' 
  AND token = '/AItKAFWyfDCGWkVC+5h9Ktda+wZKIlMaObjDK0Hlmg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}